Mechanical Technology, Incorporated

FAQ

A multimeter set to the Ohm function can be used for continuity testing to check if there is a break in the coax or if there is a short in the probe or cable. Since the coax cable is more likely to be damaged let’s check it first.

If the cable is not separate from the probe then proceed to the probe test. It is sometimes easier to have help with this. Also a socket and pin combination is helpful.
  • ► Check for continuity of the cable center conductor from each end, the resistance should be less than 10 ohms, repeat for the outside conductor (connector shell).
  • ► Check for a short between the center and the outside conductor of the cable, the resistance value should be infinite (> 100 Mega-ohm).
Probe test

Being careful not to scratch the probe face, clean the probe face using a soft cloth and isopropyl alcohol.
  • ► Check for continuity between the sensing area (center) of the probe face and center conductor of the connector, the resistance should be less than 10 ohms.
  • ► Check for continuity between the guard (middle ring) of the probe face and the outside shell of the coax connector, the resistance should be less than 10 ohms. Check for a short between the sensing area and the guard ring, the resistance value should be infinite (> 10 Mega-ohms).
  • ► Check for a short between the guard ring and the ground (probe body) of the probe face, the resistance value should be infinite (> 10 Mega-ohms).
If the probe or cable fails these tests it should be returned to MTI. If the coax cable and the probe pass these tests then it’s likely the amplifier has an internal failure and should be returned to MTI. The probe, cable and amplifier should be returned as a set as they are matched during the calibration. 

Note:
Probe shorts can be caused by scuffing the face of the probe on a target surface. Sometimes the metal surfaces smear across the tiny insulating gaps. Usually this can be repaired by lapping the probe. Open conditions are caused by the coax conductors separating from the connector or where an ILA probe lead joins the probe body.
The ProTrak TM laser scanners are now LabVIEW compatible, opening up this technology to an infinite number of dimensional inspection applications. These line scanners provide calibrated 2D profile data (X,Z ordered pairs) in real time by utilizing the laser triangulation principle. Scanning over a part or process provides a 3D point cloud (X,Y,Z), using an encoder as a Y axis reference. Intensity data for each point is also provided and can be very useful in some applications. Working in challenging inspection applications where traditional cameras fail, the ProTrak TM G laser displacement sensor measures in the Z axis and is lighting independent, seeing only the laser energy and ignoring ambient light. Traditional applications for this type of technology have included gap, step height, angle, width, seam location, and others. Now, by combining the ProTrak TM profiling laser hardware with the power, ubiquity and scope of National Instruments’ LabvVIEWsoftware, the number of applications is seemingly limitless. Examples of more complex inspection applications include connectors, printed circuit boards, tires, threaded parts, aerospace and automotive parts, extrusions, and many, many more.

This 2D / 3D laser displacement sensor included SDK also supports software development in C++ and other programming environments. Custom turnkey systems are available through National Instruments Alliance Partner integrator.
Company Model Resolution
nm RMS1
Linearity± Range2 Frequency response Stability
ppm/C
MTI Accumeasure 9000 0.018 0.02 0.012-15 mm 0-5 kHz 60
Microsense 4810 0.04 0.025 0.010-4 mm 0-10 kHz 200
1 Resolution is in nanometers  at 1Hz bandwidth, 1 meter coax, 1mm sensor diameter, 25µm range.
2 Min range to  Max range of probes available in mm

According to published specs, the Accumeasure 9000 product offers up to two displacement channels while Microsense 4810 product offers a single channel.  In addition, the Accumeasure 9000 has a larger selection of probes with ranges of up to 15 millimeters while Microsense 4810 product range is up to +/- 2 millimeters.  While linearity is similar, stability as listed in each company’s brochure, the AS 9000 has more than 2X better thermal stability.

MTI’s Accumeasure 9000 capacitance displacement sensor offers up to two displacement channels, while Microsense 4810 product only offers a single channel.  In addition, the Accumeasure 9000 has a larger selection of probes, with ranges of up to 15 millimeters, while the Microsense 4810 probes only range up to +/- 2 millimeters.  While linearity is comparable, the Accumeasure 9000 capacitance displacement sensor has more than 2X better thermal stability

Company Model Resolution
nm RMS1
Linearity± Range2 Frequency response Stability
ppm/C
MTI  AS 500 0.018 0.02 0.012-15 mm 0-5 kHz 60
Microsense 4810 3U high Eurocard for rack mounting 0.0039 0.25 0.05-1.5 mm 0-100 kHz 200
1 Resolution is in nanometers  at 1Hz bandwidth, 1 meter coax, 1mm sensor diameter, 25µm range.
2 Min range to  Max range of probes available in mm

According to published specs, the Accumeasure 500 rack individually can accept probes with ranges up to 15 millimeters compared to Microsense 4810 3U Eurocard for rack mounting which only accepts probes up to just 1.5 millimeters. Although the Microsense has better resolution it trades off linearity (10X worse than MTI AS 500 rack) for resolution. 

According to published specs, the Accumeasure 500 capacitance displacement sensor rack’s individual Amplifiers can accept probes with ranges up to 15 millimeters compared to Microsense 4810 3U Eurocard for rack mounting which only accepts probes up to just +/- 2mm.

Company Model Resolution
nm RMS1
Linearity± Range2 Frequency response Stability
ppm/C
MTI  Accumeasure 9000 0.018 0.02 0.012-15 mm 0-5 kHz 60
Microsense 6810 0.0039 0.25 0.05-1.5 mm 0-100 kHz 200
1Resolution is in nanometers  at 1Hz bandwidth, 1 meter coax, 1mm sensor diameter, 25µm range.
2 Min range to  Max range of probes available in mm

According to published specs, the Accumeasure 9000 product offers up to two displacement channels while Microsense 6810 product offers a single channel.  In addition, the AS9000 has a larger selection of probes with ranges of up to 15 millimeters while Microsense 4810 product range is up to +/- 2millimeters.  While linearity is similar, stability as listed in each company’s brochure, the Accumeasure 9000 has more than 2X better thermal stability.

MTI’s Accumeasure 9000 offers up to two displacement channels, while Microsense 6810 product only offers a single channel. In addition, the AS9000 has a larger selection of probes with ranges of up to 15 millimeters while Microsense 4810 product range is up to +/- 2millimeters.  While linearity is similar, stability as listed in each company’s brochure, the AS 9000 capacitance displacement sensor has more than 2X better thermal stability.

Company Model Resolution
nm RMS1
Linearity± Range2 Frequency response Stability
ppm/C
MTI  Accumeasure 9000 0.018 0.02 0.012-15 mm 0-5 kHz 60
Capacitec 410XSC 0.000036 0.2 0.5-12.7 mm 232 Hz -6 kHz 50
1 Resolution is in nanometers  at 1Hz bandwidth, 1 meter coax, 1mm sensor diameter, 25µm range.
2 Min range to  Max range of probes available in mm

According to published specs, the Accumeasure 9000 has 10X better linearity than Capacitec 410XSC individual boards.

According to published specs, the AS9000 has 10X better linearity than Capacitec’s  410XSC individual boards.

Company Model Resolution
nm RMS1
Linearity± Range2 Frequency response Stability
ppm/C
MTI  Accumeasure 9000 0.018 0.02 0.012-15 mm 0-5 kHz 60
Capacitec 520 0.0127 0.05 0.5-12.7 mm 0-16 kHz 110
1 Resolution is in nanometers  at 1Hz bandwidth, 1 meter coax, 1mm sensor diameter, 25µm range.
2 Min range to  Max range of probes available in mm

According to published specs, the Accumeasure 500 rack individual boards have 2.5X better linearity than Capacitec 520 individual boards.  The Accumeasure 500 has better thermal stability than the Capacitec 520 individual boards by almost a factor of 2x. 
Company Model Resolution
nm RMS1
Linearity± Range2 Frequency response Stability
ppm/C
MTI Accumeasure 9000 0.018 0.02 0.012-15 mm 0-5 kHz 60
MicroEpsilon 6300 0.25 0.2 0.05-10 mm 0-8 kHz 100
1 Resolution is in nanometers  at 1Hz bandwidth, 1 meter coax, 1mm sensor diameter, 25µm range.
2 Min range to  Max range of probes available in mm

According to published specs, the Accumeasure 9000 product offers up to two displacement channels while MicroEpsilon 6300 product offers a single channel.  In addition, the AS9000 has a larger selection of probes with ranges of up to 15 millimeters while MicroEpsilon 6300 product only up to 10 millimeters.  Additionally, the AS 9000 has more than 10X better linearity.  The AS 9000 has better thermal stability at 60 ppm/C versus the MicroEpsilon 6300 with a stability of 100 ppm/C.
Model Resolution Linearity±
FSO1
Frequency response2 Range Stability Channels Non-conductive  Ethernet & USB
MTI Digital
Accumeasure
0.045 nm 0.01% 5 kHz 25 µm to
12 mm
10 to
50 ppm
1 to 4 Yes Yes
MicroEpsilon
Digital 6500
0.02 nm 0.05% 8.5 kHz 50 µm to
10 mm
10 ppm 1 to 8 No No
1FSO is full scale output
2Bandwidth reduces as channels increase 2kHz @ 4 CH

The Digital Accumeasure series has an ultra-compact design unit with capacity for up to 4 channels in a housing very small housing with only 2" (53mm) H x 4" (103mm) W x 4.7" (120mm) D. According to published specs, the Digital Accumeasure offers 5X better stability than MicroEpsilon Digital 6500 product. Although the MicroEpsilon Digital 6500 product has up to 8.5kHz frequency response in total, its bandwidth decreases with the use of every additional channel. For example, a 4 channel MicroEpsilon Digital 6500 would only provide about 2kHz frequency response when in simultaneous use. In contrast, a 4 channel Digital Accumeasure product would provide 5Khz frequency response per channel when channels are used simultaneously. While both units have the ability for users to perform math functions, the Digital Accumeasure has an additional software module at no extra cost to measure non-conductive target thickness which the MicroEpsilon Digital 6500 does not.
The Digital Accumeasure series has an ultra-compact design unit with capacity for up to 4 channels in a housing very small housing with only 2" (53mm) H x 4" (103mm) W x 4.7" (120mm) D. According to published specs, the Digital Accumeasure offers 5X better stability than MicroEpsilon Digital 6500 product. Although the MicroEpsilon Digital 6500 product has up to 8.5kHz frequency response in total, its bandwidth decreases with the use of every additional channel. For example, a 4 channel MicroEpsilon Digital 6500 would only provide about 2kHz frequency response when in simultaneous use. In contrast, a 4 channel Digital Accumeasure product would provide 5Khz frequency response per channel when channels are used simultaneously. While both units have the ability for users to perform math functions, the Digital Accumeasure has an additional module to measure non-conductive target thickness which the MicroEpsilon Digital 6500 does not.
Model Resolution Linearity±
FSO1
Frequency response2 Range Stability Channels Non-
conductive3
Ethernet & USB
MTI Digital Accumeasure 0.045 nm 0.01% 5 kHz 25 µm to
12 mm
10 to
50 ppm
1 to 4 Yes Yes
MicroEpsilon
Digital 6220
0.125 nm 0.02% 1.5 kHz 50 µm to
10 mm
200 ppm 1 to 4 No No
1FSO is full scale output
2Bandwidth reduces as channels increase 2kHz @ 4 CH
3thickness ready

The Digital Accumeasure series has an ultra-compact design unit with capacity for up to 4 channels in a housing very small housing with only 2" (53mm) H x 4" (103mm) W x 4.7" (120mm) D. According to published specs, the Digital Accumeasure offers 5X better stability than MicroEpsilon Digital 6500 product. Although the MicroEpsilon Digital 6500 product has up to 8.5kHz frequency response in total, its bandwidth decreases with the use of every additional channel. For example, a 4 channel MicroEpsilon Digital 6500 would only provide about 2kHz frequency response when in simultaneous use. In contrast, a 4 channel Digital Accumeasure product would provide 5Khz frequency response per channel when channels are used simultaneously. While both units have the ability for users to perform math functions, the Digital Accumeasure has an additional software module at no extra cost to measure non-conductive target thickness which the MicroEpsilon Digital 6500 does not.

The Digital Accumeasure series has an ultra-compact design unit with capacity for up to 4 channels in a housing very small housing with only 2" (53mm) H x 4" (103mm) W x 4.7" (120mm) D. According to published specs, the Digital Accumeasure offers up to 4X better stability than MicroEpsilon Digital 6500 product while providing more than 2.5X resolution. The Digital Accumeasure Series is up to 20X more stable than the MicroEpsilon Digital 6220. The Digital Accumeasure Series has 5kHz frequency response while the MicroEpsilon Digital 6220 can provide only up to 1.5kHz. While both units have the ability for users to perform math functions, the Digital Accumeasure has an additional module to measure non-conductive target thickness which the MicroEpsilon Digital 6500 does not.
Proximity laser sensors use laser triangulation to detect the presence of objects with a go/ no­go output. High resolution laser sensors measure the distance to a target and provide either an analog voltage proportional to the distance or a digital output that directly indicates the distance in engineering units such as mm or inches.

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